Which Chlamydia serotypes primarily cause Trachoma?

Which Chlamydia serotypes primarily cause Trachoma?

• A. D-K
• B. E-F
• C. A-C
• D. G-H

Answer: (C)

Trachoma is caused by a subset of Chlamydia trachomatis that preferentially infects the eye. The serovars A, B, and C are the classic ocular strains linked to trachoma, and they are responsible for the chronic conjunctival inflammation that can lead to scarring and blindness with repeated infections. Other serovars—those in the D through K group—tend to cause urogenital infections (and neonatal conjunctivitis), while L1–L3 cause lymphogranuloma venereum. Therefore, serovars A through C are the ones primarily responsible for Trachoma.

Trachoma is caused by a subset of Chlamydia trachomatis that preferentially infects the eye. The serovars A, B, and C are the classic ocular strains linked to trachoma, and they are responsible for the chronic conjunctival inflammation that can lead to scarring and blindness with repeated infections. Other serovars—those in the D through K group—tend to cause urogenital infections (and neonatal conjunctivitis), while L1–L3 cause lymphogranuloma venereum. Therefore, serovars A through C are the ones primarily responsible for Trachoma.